heaving to and hoving to are completely different. As I recall (but i maybe mixing them up!) hoving to is an emergency heavy weather manoever with the idea that the boat is kept at an angle wrt to the on coming waves of about 45 degrees so that the boat maintains speed , rudder control and can roll over the waves. The other, heaving to, is a configuration in order that the boat can be left to sail itself by backing the jib
and easing the main so the sailor can do other jobs. If you back the jib
and ease the main in storm conditions very good luck to you. Just for further the confusion "bijdraaien' , in dutch is how the sails where traditionally set in good weather so the boat could be left to steer itself and bijleggen is what the dutch sailors did in storm conditions to keep the ship rolling over the waves at a angle.